"And, to deal plainly, I fear I am not in my perfect mind." So speaks King Lear towards the end of his monumental journey of self-knowledge that has taken the mad monarch from the highest to the lowest reaches of human experience.
Unsurprisingly, it was an ambition long held and within the grasp of the actor Edward Petherbridge to play Lear, widely regarded as the summit of a classical thespian's career, when, in New Zealand to take on the part in 2007, he was struck down by not one but two strokes.